I currently have 2 group growing out & I have 2 females holding. They grow really, really slow. They probably won't be big enough to sell untill Feb/March. I'll make a for sale post when they are ready.
I have 15 or 20 (they are about 3 months old) - but as Jon said they grow very slowly and these are not quite big enough to sex yet - but I have pics of the parents and some of a previous spawn (4) that I might be able to sex - are you looking for a breeding group or a bunch to grow out? PM me if your interested.